Diphtheria is caused by Corynebacterium species, mostly by toxin-producing Corynebacterium diphtheriae and rarely by toxin-producing strains of C. ulcerans and C. pseudotuberculosis. The most common type of diphtheria is classic respiratory diphtheria, whereby the exotoxin produced characteristicall...y causes the formation of a pseudomembrane in the upper respiratory tract and damages other organs, usually the myocardium and peripheral nerves. Acute respiratory obstruction, acute systemic toxicity, myocarditis and neurologic complications are the usual causes of death. The infection can also affect the skin (cutaneous diphtheria). More rarely, it can affect mucous membranes at other non-respiratory sites, such as genitalia and conjunctiva.
C. diphtheriae is transmitted from person to person by intimate respiratory and direct contact; in contrast, C. ulcerans and C. pseudotuberculosis are zoonotic infections, not transmitted person-to-person. The incubation period of C. diphtheriae is two to five days (range 1– 10 days). A person is infectious as long as virulent bacteria are present in respiratory secretions, usually two weeks without antibiotics, and seldom more than six weeks. In rare cases, chronic carriers may shed organisms for six months or more. Skin lesions are often chronic and infectious for longer periods. Effective antibiotic therapy (penicillin or erythromycin) promptly terminates shedding in about one or two days.
more
Anaemia is a serious global public health problem that particularly affects young children, menstruating adolescent girls and women, and pregnant and postpartum women. It is a condition in which the number of red blood cells or the haemoglobin concentration within them is lower than normal, affectin...g the blood’s ability to carry oxygen to the body’s tissues.
To reliably monitor the prevalence of anaemia at a population level, it is vital to measure the haemoglobin concentration in an accurate and precise way. In large-scale surveys, however, haemoglobin is most commonly measured using single-drop capillary blood specimens in point-of-care devices. Emerging evidence suggests that the use of single-drop capillary blood can introduce random and/or systematic errors, which may lead to inaccurate estimates, complicating effective anaemia programming.
This technical brief describes the current best practices for haemoglobin measurement, providing guidance to help plan or implement field surveys to assess anaemia at a population level. Continuing work to review emerging evidence is led by members of the WHO-UNICEF Technical Expert Advisory group on nutrition Monitoring (TEAM).
more
Learning from the Pakistan Experience. A Manual for Post-Disaster Housing Program Managers
Global cardiovascular disease (CVD) burden is high and rising, especially in low-income and middle-income countries (LMICs). Focussing on 45 LMICs, we aimed to determine (1) the adult population’s median 10-year predicted CVD risk, including its variation within countries by socio-demographic char...acteristics, and (2) the prevalence of self-reported blood pressure (BP) medication use among those with and without an indication for such medication as per World Health Organization (WHO) guidelines.
more
Groupe d'étude sur la douleur et les politiques / Centre collaborateur de l'OMS pour les politiques de soulagement de la douleur et de soins palliatifs
A systematic review informing a radical transformation of health workforce development
Центр лечения тяжелых острых респираторных инфекцийПрактическое руководство по организации центра лечения ТОРИ ицентра проведения скрининга на ТОРИ на базе мед...цинских учреждений
more
This guidance is targeted to primary health care policy-makers and only addresses issues relevant for primary health care providers. It has been prepared on the basis of a systematic review of the best available evidence and emergent country practices in response to the COVID-19 outbreak in the WHO ...European Region. It will be updated on a regular basis as new information becomes available.
more
Trachoma is the world’s leading infectious cause of blindness. It is one of 18 neglected
tropical diseases (NTDs) that affect over one billion of the world’s poorest people.
Assurer l’égalité des genres dans l’application de la stratégie CHANCE
The Integrated Management of Adolescent/Adult Illness (IMAI) approach
Las presentes Directrices para el Abordaje del VIH en Contextos de Asistencia Humanitaria tienen el propósito de ayudar a las organizaciones de asistencia humanitaria y VIH a planificar la administración de un conjunto mínimo de servicios de prevención, tratamiento, atención y apoyo para el VIH... a las personas afectadas por crisis humanitarias.
more